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Search for the Lepton Number Violating Process nu_mu-bar e^- -> mu^- nu_e-bar

NuTeV Collaboration·J. A. Formaggio·J. Yu
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Abstract

The NuTeV experiment at Fermilab has used a sign-selected neutrino beam to perform a search for the lepton number violating process nu_mu-bar e^- -> mu^- nu_e-bar, and to measure the cross-section of the Standard Model inverse muon decay process nu_mu e^- -> mu^- nu_e. NuTeV measures the inverse muon decay asymptotic cross-section sigma/E to be 13.8 +/- 1.2 +/- 1.4 x 10^-42 cm^2/GeV. The experiment also observes no evidence for lepton number violation and places one of the most restrictive limits on the LNV/IMD cross-section ratio at < 1.7% at 90% C.L. for V-A couplings and < 0.6% for scalar couplings.

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NuTeV Collaboration, J. A. Formaggio, J. Yu. 2001-04-16. Search for the Lepton Number Violating Process nu_mu-bar e^- -> mu^- nu_e-bar. https://doi.org/10.1103/physrevlett.87.071803

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